Electric stop-motion for warring-machines



(No Model.)

CLAYTON DENN, J. COOKER & CHARLES DENN.

ELECTRIC STOP MOTION FOR WARPING MAGHINES.

Patented Jan. 2, 1894.

UNITED STATES PATENT QEEIQE.

CLAYTON DENN, JOHN COOKER, AND CHARLES DENN, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC STOP-MOTION FOR WARPlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 512,013, dated January 2, 1894.

Application filed February 6, 1893. Serial No. 461,183. (No model.)

To (0 whom, it may 00771061 71:

Be it known that we, CLAYTON DENN, JOHN COOKER, and CHARLES DENN,of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and improved Electric Stop-Motion for Warping-Machines, of which the following is a full, clear, and exact description.

Our invention relates to improvements in electrical stop motions which are arranged to close electric circuits by the breaking of a yarn or thread in warping machines, and which by the closing of said circuits, operate mechanism arranged to stop the machine, the object being to prevent the manufacture of imperfect goods which follows the breaking of a yarn unless the machine is stopped and the break repaired.

Our invention relates more particularly to the sliding guides which are supported by the yarns and which operate as circuit closers. An example of guides arranged to operate in this manner is shown in the Letters Patent of the United States No. 395,851, dated January 8, 1889. In the patent referred to the yarn guides close a circuit when the yarn breaks so that electrically controlled mechanism stops the machine, but a serious objection to the arrangement of the guides as circuit closers in the machine illustrated in said patent is, that when the guides drop to close a circuit they always strike in the same place, and after repeated contacts the abutting parts oxidize to such an extent that the circuit closers fail to work after a time and the whole stop mechanism therefore becomes inoperative.

The object of our invention is to overcome this difficulty and arrange the guides so that when dropped by the broken yarns they will make a sliding contact with adjacent terminals and in this way there is always sufficient surface engaged to insure the closing of the circuit, and the parts do not oxidize to such an extent as to interfere with such closing.

To this end our invention consists in certain features of construction and combinations of parts, as will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the Views.

Figure 1 is a broken sectional elevation showing the general arrangement of the circuit closers and the stop mechanism. Fig. 2 is an enlarged detail sectional view on the line 22 in Fig. 3, showing one of the guide rails and the arrangement of the circuit closing guides therein. Fig. 3 is a sectional plan on the line 3-3 inFig.2. FigAt isabroken plan of a portion of the stop mechanism.

The yarn spools are arranged in the usual way between the sections, the spools being pivoted in a supporting frame 11 and opposite each vertical row of spools is a rail 12 which is grooved longitudinally, as shown at 13, to receive the yarn guides and circuit closers 14:. Each guide and circuit closer is made preferably of wire and is adapted to slide vertically in the groove 13, the upper end portion of the guide and circuit closer being bent outward and downward, as shown at 15, so as to project beyond the face of the rail 12, and this bent upper end 15 terminates in an eye 16 through which the yarn runs. Thelower end of the circuit closer is bent upward and outward, as shown at 17 in Fig. 2, this bent orinclined portion being adapted to strike a contact pin, as described below.

In the back of the groove 13 is a contact strip 18 which forms one terminal of an electric circuit, the strip connecting by a wire a which is wound around the magnet 19 for operating the circuit mechanism with the battery A or other source of electricity, and another wire a' leads from the battery to acouducting strip 20 on one side of the rail 12. Rivets or pins 21 connect with this conducting strip 20 and extend through or across the groove 13 so as to be in the path of the inclined or bent ends 17 of the guides or circuit closers 1a when the latter are dropped. The upward movement of the guides is limited by cross pins 22 extending across the groove, as shown clearly in Fig. 2,

these pins being arranged in pairs for the purpose of retaining the drop wires in the grooves and in loose contact with the strips 18, thus forming metal guides for the drop wires.

The warp yarns 23 extend from the spools around the bevel corner 24 of the adjacent rail 12, thence through the eyes 16 of the guides and circuit closers and across the face of the rail, the yarns moving across a guide rod 25 which prevents excessive friction and through screw eyes 26 on the rail, the latter acting as fulcrums and causing the yarns to lift the circuit closers andguides; from the uides the yarns pass to the gatherer 27 in the usual way. When one of the circuit closers and guides 14 is lifted, the inclined lower end 17 strikes the lower pin 22, and as the inclined end is held up against the pin, the guide 14 is'held out of contact with the strip 18, but if the yarn breaks the guide is dropped and makes a sliding contact with the strip 18 and with the pin 21, so as to close the circuit through the magnet 19, and the stopping mechanism is operated as hereinafter described, so as to stop the machine.

The circuit closed by the dropping of the guide is as follows: from the battery A, through the Wire a and magnet 19, the contact strip 18, the circuit closer and guide 14, the pin 21, the conducting strip 20 and the wire a, back to the battery.

The machine is driven by a shaft 39 having tight and loose pulleys 40 and 41, but the connection between the shaft and machine is not shown, as it may be of any kind, and the mechanism for stopping the shaft is illustrated merely to show an operative device, but such mechanism is of this invention. In a support 42, adjacent to the shaft 39, is a held to slide in a direction parallel with the shaft 39 and this bar has arms 44 extending upward over the pulleys and adapted to engage the belt which drives the pulleys' The bar 43 has acollar 45 upon it and it is pressed by a spring 46 which is strong enough to move the shipper bar and shift the belt. The bar is held against the by means of a stud 47 on the bar 43, and a lever 48, the upper end of which is held between the stud and the adjacent support 42. The lever 48 extends normally in a vertical position and is fulcrumed in the center, as shown at 49. To its lower end is pivoted, as shown at 50, a laterally extending lever 51, the lever extending beneath the shaft 39 and on one end of the lever is formed an angular armature 52 which extends horizontally above the core of the magnet 19. The inclination of the lever 51 is regulated by a screw 53 which projects through the lever 48 and against the back of the armature 52. The weight of the lever 51 issufficient to hold the armature 52 in an elevated position when the magnet 19 is not energized.

not claimed as a part,

shipper bar 43 which is.

pressure of its spring Extending in a position substantially parallel with the lever 48 is a vibrating lever 54 which is fulcrumed on the support 42, as shown at 55, and the lower end of this lever is arranged so as to normally swing above the free end of the lever 51. The upper end of the lever 54 terminates in a rounded head 56 which rides on an eccentric 57 on the shaft 39, the head being held in engagement with the eccentric by a spring 54 which is secured to the upper portion of the lever 54 and to the support 42. It will be seen then that when the machine is running and the warp is all right, the lever 54 will vibrate freely, but when one of the yarns 23 breaks, aguide and circuit closer is dropped, as above described, the circuit through the magnet 19 is closed and the armature 52 is pulled down so as to swing the lever 51 upward and into the path of the lever 54, the lower end of which strikes the free end of the lever 51, thus pushing the latter longitudinally toward the magnet 19 and swinging the lever 48 so as to move its upper end out of the pathof the stud 47, and the spring 46 then pushes the shipper bar 43 so that the arms 44, acting on the belt, push the latter upon the loose pulley 41 and the machine is instantly stopped.

The stopping mechanism controlled by the magnet 19 forms no part of this invention, and it will be understood that the guidesand circuit closers described may be used for operating any other suitable mechanism-adapted to stop the warping machine.

Having thus described our invention, We claim as new and desire to secure by Letters Patent 1. In an electric stop motion for warping machines the combination, of the grooved rail having a contact strip in the back of the groove adapted to form one terminalof an electric circuit, the transverse pins extending through the grooves and forming the other terminal of the circuit, and the sliding yarn guides and circuit closers held to slide in the groove, each guide having an inclined lower end to contact with the terminal pinsand an outwardly extending upper end terminating in a yarn eye, substantially as described.

2. In an electric stop motion for warping machines, the combination of the vertically grooved rail having a contact strip in its back forming one terminal of an electric circuit, the transverse pins extending across the groove and forming the other terminal of the circuit, the sliding guide and circuit closer held to slide in the groove, the guide having an upwardly bent lower end and an outwardly bent upper end terminating in aneye, and a second set of pins extending across the groove and adapted to hold the circuit closer in loose contact with metal strips in the bottom of the groove,substantially as described. 3. In an electric stop :motionfor warping machines the combination of the vertically and the guide eyes extending outward from 10 the rail, substantially as described.

CLAYTON DENN. JOHN COOKER. CHARLES DENN.

Witnesses:

J OHN SHALLOROSS, FRED. W. CASSIDY. 

